Importers of HS 8506.10 (manganese dioxide) from Indonesia actually paid 12.7% on the taxed portion of the value in 2026-06 — 12.7% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 2.7%. Over the window the rate on the taxed portion moved 2.7% → 12.7%, with the largest single step +6.5pp in 2025-10. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 2.7% — importers actually paid 12.7%, so the trade-war overlay added 10 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "8506.10", origin: "Indonesia") · see it at trimtabist.com/tariffs
HS 8506.10. The schedule base rate is 2.7%; importers from Indonesia actually paid 12.7% on the dutiable value in 2026-06 — the trade-war overlay added 10 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 2.7% (2023-07) → 12.7% (2026-06), largest single step +6.5pp in 2025-10.
Indonesia's lower duty (12.7% vs 35.26%) lets it price up to 20% above China at the factory and still match on duty-inclusive customs cost. But on the LATEST measured prices, Indonesia actually lands cheaper — $4.96/kg vs $5.63/kg (duty in, freight out).
2 Chapter-99 measures name Indonesia; scope mapping is partial (several annexes are PDFs) — absence never means exemption. They do not sum, and some are product-specific — the collected rate above is the composed truth.
All goods from Indonesia · the whole tariff ledger · 2 CBP rulings cite this code · reproduce: tariff_story(hs: "8506.10", origin: "Indonesia") via /connect. Not customs or legal advice.